From mboxrd@z Thu Jan 1 00:00:00 1970 From: roliveir Subject: [RFC 2/2] Add support for Omnivision OV5647 Date: Tue, 24 May 2016 19:16:48 +0100 Message-ID: <97a917a80babf2648d5d02e66beea00e4e3892a5.1464112779.git.roliveir@synopsys.com> References: Return-path: In-Reply-To: In-Reply-To: References: Sender: linux-media-owner@vger.kernel.org To: linux-media@vger.kernel.org, devicetree@vger.kernel.org Cc: mchehab@osg.samsung.com, robh+dt@kernel.org, Ramiro.Oliveira@synopsys.com, CARLOS.PALMINHA@synopsys.com List-Id: devicetree@vger.kernel.org Signed-off-by: roliveir --- MAINTAINERS | 7 + drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov5647.c | 891 +++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 910 insertions(+) create mode 100644 drivers/media/i2c/ov5647.c diff --git a/MAINTAINERS b/MAINTAINERS index 81d940b..06697fc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8106,6 +8106,13 @@ M: Harald Welte S: Maintained F: drivers/char/pcmcia/cm4040_cs.* +OMNIVISION OV5647 SENSOR DRIVER +M: Ramiro Oliveira +L: linux-media@vger.kernel.org +T: git git://linuxtv.org/media_tree.git +S: Maintained +F: drivers/media/i2c/ov5647.c + OMNIVISION OV7670 SENSOR DRIVER M: Jonathan Corbet L: linux-media@vger.kernel.org diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 993dc50..1d4891b 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -500,6 +500,17 @@ config VIDEO_OV2659 To compile this driver as a module, choose M here: the module will be called ov2659. +config VIDEO_OV5647 + tristate "OmniVision OV5647 sensor support" + depends on I2C && VIDEO_V4L2 + depends on MEDIA_CAMERA_SUPPORT + ---help--- + This is a Video4Linux2 sensor-level driver for the OmniVision + OV5647 camera. + + To compile this driver as a module, choose M here: the + module will be called ov5647. + config VIDEO_OV7640 tristate "OmniVision OV7640 sensor support" depends on I2C && VIDEO_V4L2 diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index 94f2c99..a732a0c 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -80,3 +80,4 @@ obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o obj-$(CONFIG_VIDEO_ML86V7667) += ml86v7667.o obj-$(CONFIG_VIDEO_OV2659) += ov2659.o obj-$(CONFIG_VIDEO_TC358743) += tc358743.o +obj-$(CONFIG_VIDEO_OV5647) += ov5647.o diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c new file mode 100644 index 0000000..4c58339 --- /dev/null +++ b/drivers/media/i2c/ov5647.c @@ -0,0 +1,891 @@ +/* + * A V4L2 driver for OmniVision OV5647 cameras. + * + * Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver + * Copyright (C) 2011 Sylwester Nawrocki + * + * Based on Omnivision OV7670 Camera Driver + * Copyright (C) 2006-7 Jonathan Corbet + * + * Copyright (C) 2016, Synopsys, Inc. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static bool debug; +module_param(debug, bool, 0644); +MODULE_PARM_DESC(debug, "Debug level (0-1)"); + +/* + * The ov5647 sits on i2c with ID 0x6c + */ +#define OV5647_I2C_ADDR 0x6c +#define SENSOR_NAME "ov5647" + +#define OV5647_REG_CHIPID_H 0x300A +#define OV5647_REG_CHIPID_L 0x300B + +#define REG_TERM 0xfffe +#define VAL_TERM 0xfe +#define REG_DLY 0xffff + +/*define the voltage level of control signal*/ +#define CSI_STBY_ON 1 +#define CSI_STBY_OFF 0 +#define CSI_RST_ON 0 +#define CSI_RST_OFF 1 +#define CSI_PWR_ON 1 +#define CSI_PWR_OFF 0 +#define CSI_AF_PWR_ON 1 +#define CSI_AF_PWR_OFF 0 + + +#define OV5647_ROW_START 0x01 +#define OV5647_ROW_START_MIN 0 +#define OV5647_ROW_START_MAX 2004 +#define OV5647_ROW_START_DEF 54 + +#define OV5647_COLUMN_START 0x02 +#define OV5647_COLUMN_START_MIN 0 +#define OV5647_COLUMN_START_MAX 2750 +#define OV5647_COLUMN_START_DEF 16 + +#define OV5647_WINDOW_HEIGHT 0x03 +#define OV5647_WINDOW_HEIGHT_MIN 2 +#define OV5647_WINDOW_HEIGHT_MAX 2006 +#define OV5647_WINDOW_HEIGHT_DEF 1944 + +#define OV5647_WINDOW_WIDTH 0x04 +#define OV5647_WINDOW_WIDTH_MIN 2 +#define OV5647_WINDOW_WIDTH_MAX 2752 +#define OV5647_WINDOW_WIDTH_DEF 2592 + +enum power_seq_cmd { + CSI_SUBDEV_PWR_OFF = 0x00, + CSI_SUBDEV_PWR_ON = 0x01, +}; + +struct regval_list { + uint16_t addr; + uint8_t data; +}; + +struct cfg_array { + struct regval_list *regs; + int size; +}; + +struct sensor_win_size { + int width; + int height; + unsigned int hoffset; + unsigned int voffset; + unsigned int hts; + unsigned int vts; + unsigned int pclk; + unsigned int mipi_bps; + unsigned int fps_fixed; + unsigned int bin_factor; + unsigned int intg_min; + unsigned int intg_max; + void *regs; + int regs_size; + int (*set_size)(struct v4l2_subdev *subdev); +}; + + +struct ov5647 { + struct device *dev; + struct v4l2_subdev subdev; + struct media_pad pad; + struct mutex lock; + struct v4l2_mbus_framefmt format; + struct sensor_format_struct *fmt; + unsigned int width; + unsigned int height; + unsigned int capture_mode; + int hue; + struct v4l2_fract tpf; + struct sensor_win_size *current_wins; +}; + +static inline struct ov5647 *to_state(struct v4l2_subdev *subdev) +{ + return container_of(subdev, struct ov5647, subdev); +} + +static struct regval_list sensor_oe_disable_regs[] = { + {0x3000, 0x00}, + {0x3001, 0x00}, + {0x3002, 0x00}, +}; + +static struct regval_list sensor_oe_enable_regs[] = { + {0x3000, 0x0f}, + {0x3001, 0xff}, + {0x3002, 0xe4}, +}; + +static struct regval_list ov5647_640x480[] = { + {0x0100, 0x00}, + {0x0103, 0x01}, + {0x3034, 0x08}, + {0x3035, 0x21}, + {0x3036, 0x46}, + {0x303c, 0x11}, + {0x3106, 0xf5}, + {0x3821, 0x07}, + {0x3820, 0x41}, + {0x3827, 0xec}, + {0x370c, 0x0f}, + {0x3612, 0x59}, + {0x3618, 0x00}, + {0x5000, 0x06}, + {0x5001, 0x01}, + {0x5002, 0x41}, + {0x5003, 0x08}, + {0x5a00, 0x08}, + {0x3000, 0x00}, + {0x3001, 0x00}, + {0x3002, 0x00}, + {0x3016, 0x08}, + {0x3017, 0xe0}, + {0x3018, 0x44}, + {0x301c, 0xf8}, + {0x301d, 0xf0}, + {0x3a18, 0x00}, + {0x3a19, 0xf8}, + {0x3c01, 0x80}, + {0x3b07, 0x0c}, + {0x380c, 0x07}, + {0x380d, 0x68}, + {0x380e, 0x03}, + {0x380f, 0xd8}, + {0x3814, 0x31}, + {0x3815, 0x31}, + {0x3708, 0x64}, + {0x3709, 0x52}, + {0x3808, 0x02}, + {0x3809, 0x80}, + {0x380a, 0x01}, + {0x380b, 0xE0}, + {0x3801, 0x00}, + {0x3802, 0x00}, + {0x3803, 0x00}, + {0x3804, 0x0a}, + {0x3805, 0x3f}, + {0x3806, 0x07}, + {0x3807, 0xa1}, + {0x3811, 0x08}, + {0x3813, 0x02}, + {0x3630, 0x2e}, + {0x3632, 0xe2}, + {0x3633, 0x23}, + {0x3634, 0x44}, + {0x3636, 0x06}, + {0x3620, 0x64}, + {0x3621, 0xe0}, + {0x3600, 0x37}, + {0x3704, 0xa0}, + {0x3703, 0x5a}, + {0x3715, 0x78}, + {0x3717, 0x01}, + {0x3731, 0x02}, + {0x370b, 0x60}, + {0x3705, 0x1a}, + {0x3f05, 0x02}, + {0x3f06, 0x10}, + {0x3f01, 0x0a}, + {0x3a08, 0x01}, + {0x3a09, 0x27}, + {0x3a0a, 0x00}, + {0x3a0b, 0xf6}, + {0x3a0d, 0x04}, + {0x3a0e, 0x03}, + {0x3a0f, 0x58}, + {0x3a10, 0x50}, + {0x3a1b, 0x58}, + {0x3a1e, 0x50}, + {0x3a11, 0x60}, + {0x3a1f, 0x28}, + {0x4001, 0x02}, + {0x4004, 0x02}, + {0x4000, 0x09}, + {0x4837, 0x24}, + {0x4050, 0x6e}, + {0x4051, 0x8f}, + {0x0100, 0x01}, +}; + +struct sensor_format_struct; + +/** +* @short I2C Write operation +* @param[in] i2c_client I2C client +* @param[in] reg register address +* @param[in] val value to write +* @return Error code +*/ +static int ov5647_write(struct v4l2_subdev *sd, uint16_t reg, uint8_t val) +{ + int ret; + unsigned char data[3] = { reg >> 8, reg & 0xff, val}; + struct i2c_client *client = v4l2_get_subdevdata(sd); + + ret = i2c_master_send(client, data, 3); + if (ret < 3) { + v4l2_dbg(1, debug, sd, "%s: i2c write error, reg: %x\n", + __func__, reg); + return ret < 0 ? ret : -EIO; + } + return 0; +} + +/** +* @short I2C Read operation +* @param[in] i2c_client I2C client +* @param[in] reg register address +* @param[out] val value read +* @return Error code +*/ +static int ov5647_read(struct v4l2_subdev *sd, uint16_t reg, uint8_t *val) +{ + int ret; + unsigned char data_w[2] = { reg >> 8, reg & 0xff }; + struct i2c_client *client = v4l2_get_subdevdata(sd); + + + ret = i2c_master_send(client, data_w, 2); + + if (ret < 2) { + v4l2_dbg(1, debug, sd, "%s: i2c read error, reg: %x\n", + __func__, reg); + return ret < 0 ? ret : -EIO; + } + + + ret = i2c_master_recv(client, val, 1); + + if (ret < 1) { + v4l2_dbg(1, debug, sd, "%s: i2c read error, reg: %x\n", + __func__, reg); + return ret < 0 ? ret : -EIO; + } + return 0; +} + +static int ov5647_write_array(struct v4l2_subdev *subdev, + struct regval_list *regs, int array_size) +{ + int i = 0; + int ret = 0; + + if (!regs) + return -EINVAL; + + while (i < array_size) { + if (regs->addr == REG_DLY) + mdelay(regs->data); + else + ret = ov5647_write(subdev, regs->addr, regs->data); + + if (ret == -EIO) + return ret; + + i++; + regs++; + } + return 0; +} + +static void ov5647_set_virtual_channel(struct v4l2_subdev *subdev, int channel) +{ + u8 channel_id; + + ov5647_read(subdev, 0x4814, &channel_id); + channel_id &= ~(3 << 6); + ov5647_write(subdev, 0x4814, channel_id | (channel << 6)); +} + +/** +* @short Stream ON +* @param[in] subdev v4l2 subdev +* @return Error code +*/ +void ov5647_stream_on(struct v4l2_subdev *subdev) +{ + ov5647_write(subdev, 0x4202, 0x00); + v4l2_dbg(1, debug, subdev, "Stream on"); + ov5647_write(subdev, 0x300D, 0x00); + +} + +/** +* @short Stream OFF +* @param[in] subdev v4l2 subdev +* @return Error code +*/ +void ov5647_stream_off(struct v4l2_subdev *subdev) +{ + ov5647_write(subdev, 0x4202, 0x0f); + v4l2_dbg(1, debug, subdev, "Stream off"); + ov5647_write(subdev, 0x300D, 0x01); +} + +/****************************************************************************/ + +/** + * @short Set SW standby + * @param[in] subdev v4l2 subdev + * @param[in] on_off standby on or off + * @return Error code + */ +static int sensor_s_sw_stby(struct v4l2_subdev *subdev, int on_off) +{ + int ret; + unsigned char rdval; + + ret = ov5647_read(subdev, 0x0100, &rdval); + if (ret != 0) + return ret; + + if (on_off == CSI_STBY_ON) + ret = ov5647_write(subdev, 0x0100, rdval&0xfe); + + else + ret = ov5647_write(subdev, 0x0100, rdval|0x01); + + return ret; +} + +/** + * @short Store information about the video data format. + */ +static struct sensor_format_struct { + __u8 *desc; + u32 mbus_code; + struct regval_list *regs; + int regs_size; + int bpp; +} sensor_formats[] = { + { + .desc = "Raw RGB Bayer", + .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, + .regs = ov5647_640x480, + .regs_size = ARRAY_SIZE(ov5647_640x480), + .bpp = 1 + }, +}; +#define N_FMTS ARRAY_SIZE(sensor_formats) + +/* ----------------------------------------------------------------------- */ + +/** +* @short Initialize sensor +* @param[in] subdev v4l2 subdev +* @param[in] val not used +* @return Error code +*/ +static int __sensor_init(struct v4l2_subdev *subdev) +{ + int ret; + uint8_t resetval; + unsigned char rdval; + + v4l2_dbg(1, debug, subdev, "sensor init\n"); + + ret = ov5647_read(subdev, 0x0100, &rdval); + if (ret != 0) + return ret; + + ov5647_write(subdev, 0x4800, 0x25); + ov5647_stream_off(subdev); + + ret = ov5647_write_array(subdev, ov5647_640x480, + ARRAY_SIZE(ov5647_640x480)); + if (ret < 0) { + v4l2_err(subdev, "write sensor_default_regs error\n"); + return ret; + } + + ov5647_set_virtual_channel(subdev, 0); + + ov5647_read(subdev, 0x0100, &resetval); + if (!resetval&0x01) { + v4l2_dbg(1, debug, subdev, + "DEVICE WAS IN SOFTWARE STANDBY"); + ov5647_write(subdev, 0x0100, 0x01); + } + + ov5647_write(subdev, 0x4800, 0x04); + ov5647_stream_on(subdev); + + return 0; +} + +/** +* @short Control sensor power state +* @param[in] subdev v4l2 subdev +* @param[in] on Sensor power +* @return Error code +*/ +static int sensor_power(struct v4l2_subdev *subdev, int on) +{ + int ret; + struct ov5647 *ov5647 = to_state(subdev); + + ret = 0; + mutex_lock(&ov5647->lock); + + switch (on) { + case CSI_SUBDEV_PWR_OFF: + v4l2_dbg(1, debug, subdev, "CSI SUBDEV PWR OFF!\n"); + + v4l2_dbg(1, debug, subdev, "disable oe!\n"); + ret = ov5647_write_array(subdev, sensor_oe_disable_regs, + ARRAY_SIZE(sensor_oe_disable_regs)); + + if (ret < 0) + v4l2_dbg(1, debug, subdev, "disable oe failed!\n"); + + ret = sensor_s_sw_stby(subdev, CSI_STBY_ON); + + if (ret < 0) + v4l2_dbg(1, debug, subdev, "soft stby failed!\n"); + + break; + case CSI_SUBDEV_PWR_ON: + v4l2_dbg(1, debug, subdev, "CSI SUBDEV PWR ON!\n"); + + ret = ov5647_write_array(subdev, sensor_oe_enable_regs, + ARRAY_SIZE(sensor_oe_enable_regs)); + + ret = __sensor_init(subdev); + + if (ret < 0) { + v4l2_err(subdev, + "Camera not available! Check Power!\n"); + break; + } + break; + default: + return -EINVAL; + } + + mutex_unlock(&ov5647->lock); + + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +/** +* @short Get register value +* @param[in] subdev v4l2 subdev +* @param[in] reg register struct +* @return Error code +*/ +static int sensor_get_register(struct v4l2_subdev *subdev, + struct v4l2_dbg_register *reg) +{ + unsigned char val = 0; + int ret; + + ret = ov5647_read(subdev, reg->reg & 0xff, &val); + reg->val = val; + reg->size = 1; + return ret; +} + +/** +* @short Set register value +* @param[in] subdev v4l2 subdev +* @param[in] reg register struct +* @return Error code +*/ +static int sensor_set_register(struct v4l2_subdev *subdev, + const struct v4l2_dbg_register *reg) +{ + ov5647_write(subdev, reg->reg & 0xff, reg->val & 0xff); + return 0; +} +#endif + +/* ----------------------------------------------------------------------- */ + +/** + * @short Subdev core operations registration + */ +static const struct v4l2_subdev_core_ops sensor_core_ops = { + .s_power = sensor_power, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = sensor_get_register, + .s_register = sensor_set_register, +#endif +}; + +/* ----------------------------------------------------------------------- */ + + + +/** +* @short Enumerate available image formats +* @param[in] subdev v4l2 subdev +* @param[in] index index +* @param[in] code MBUS Pixel code +* @return Error code +*/ +static int sensor_enum_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->pad || code->index >= N_FMTS) + return -EINVAL; + + code->code = sensor_formats[code->index].mbus_code; + return 0; +} + +/** +* @short Try frame format internal function +* @param[in] subdev v4l2 subdev +* @param[in] fmt frame format +* @return Error code +*/ +static int sensor_try_fmt_internal(struct v4l2_subdev *subdev, + struct v4l2_mbus_framefmt *fmt, struct sensor_format_struct **ret_fmt, + struct sensor_win_size **ret_wsize) +{ + int index; + + for (index = 0; index < N_FMTS; index++) + if (sensor_formats[index].mbus_code == fmt->code) + break; + + if (index >= N_FMTS) + return -EINVAL; + + if (ret_fmt != NULL) + *ret_fmt = sensor_formats + index; + + fmt->field = V4L2_FIELD_NONE; + + return 0; +} + +/** +* @short Set frame format +* @param[in] subdev v4l2 subdev +* @param[in] fmt frame format +* @return Error code +*/ +static int sensor_s_fmt(struct v4l2_subdev *subdev, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + int ret; + struct sensor_format_struct *sensor_fmt; + struct sensor_win_size *wsize; + struct ov5647 *info = to_state(subdev); + + ov5647_write_array(subdev, sensor_oe_disable_regs, + ARRAY_SIZE(sensor_oe_disable_regs)); + + ret = sensor_try_fmt_internal(subdev, &fmt->format, + &sensor_fmt, &wsize); + if (ret) + return ret; + + ov5647_write_array(subdev, sensor_fmt->regs, sensor_fmt->regs_size); + + ret = 0; + + if (wsize->regs) + ov5647_write_array(subdev, wsize->regs, wsize->regs_size); + + if (wsize->set_size) + wsize->set_size(subdev); + + info->fmt = sensor_fmt; + info->width = wsize->width; + info->height = wsize->height; + + ov5647_write_array(subdev, sensor_oe_enable_regs, + ARRAY_SIZE(sensor_oe_enable_regs)); + + return 0; +} + +/** +* @short Set stream parameters +* @param[in] subdev v4l2 subdev +* @param[in] parms stream parameters +* @return Error code +*/ +static int sensor_s_parm(struct v4l2_subdev *subdev, + struct v4l2_streamparm *parms) +{ + struct v4l2_captureparm *cp = &parms->parm.capture; + struct ov5647 *info = to_state(subdev); + + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (info->tpf.numerator == 0) + return -EINVAL; + + info->capture_mode = cp->capturemode; + + return 0; +} + +/** +* @short Get stream parameters +* @param[in] subdev v4l2 subdev +* @param[in] parms stream parameters +* @return Error code +*/ +static int sensor_g_parm(struct v4l2_subdev *subdev, + struct v4l2_streamparm *parms) +{ + struct v4l2_captureparm *cp = &parms->parm.capture; + struct ov5647 *info = to_state(subdev); + + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + memset(cp, 0, sizeof(struct v4l2_captureparm)); + cp->capability = V4L2_CAP_TIMEPERFRAME; + cp->capturemode = info->capture_mode; + + return 0; +} + +static const struct v4l2_subdev_pad_ops ov7670_pad_ops = { + .enum_mbus_code = sensor_enum_fmt, + .set_fmt = sensor_s_fmt, +}; + +/** + * @short Subdev video operations registration + * + */ +static const struct v4l2_subdev_video_ops sensor_video_ops = { + .s_parm = sensor_s_parm, + .g_parm = sensor_g_parm, +}; + +/* ----------------------------------------------------------------------- */ + +/** + * @short Subdev operations registration + * + */ +static const struct v4l2_subdev_ops subdev_ops = { + .core = &sensor_core_ops, + .video = &sensor_video_ops, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 subdev internal operations + */ + +/** +* @short Detect camera version and model +* @param[in] subdev v4l2 subdev +* @return Error code +*/ +int ov5647_detect(struct v4l2_subdev *sd) +{ + unsigned char v; + int ret; + + ret = sensor_power(sd, 1); + if (ret < 0) + return ret; + ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &v); + if (ret < 0) + return ret; + if (v != 0x56) /* OV manuf. id. */ + return -ENODEV; + ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &v); + if (ret < 0) + return ret; + if (v != 0x47) + return -ENODEV; + + ret = sensor_power(sd, 0); + if (ret < 0) + return ret; + + return 0; +} + +/** +* @short Detect if camera is registered +* @param[in] subdev v4l2 subdev +* @return Error code +*/ +static int ov5647_registered(struct v4l2_subdev *subdev) +{ + struct i2c_client *client = v4l2_get_subdevdata(subdev); + + v4l2_info(subdev, "OV5647 detected at address 0x%02x\n", client->addr); + + return 0; +} + +/** +* @short Open device +* @param[in] subdev v4l2 subdev +* @param[in] fh v4l2 file handler +* @return Error code +*/ +static int ov5647_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh) +{ + struct v4l2_mbus_framefmt *format = + v4l2_subdev_get_try_format(subdev, fh->pad, 0); + struct v4l2_rect *crop = + v4l2_subdev_get_try_crop(subdev, fh->pad, 0); + + crop->left = OV5647_COLUMN_START_DEF; + crop->top = OV5647_ROW_START_DEF; + crop->width = OV5647_WINDOW_WIDTH_DEF; + crop->height = OV5647_WINDOW_HEIGHT_DEF; + + format->code = MEDIA_BUS_FMT_SBGGR8_1X8; + + format->width = OV5647_WINDOW_WIDTH_DEF; + format->height = OV5647_WINDOW_HEIGHT_DEF; + format->field = V4L2_FIELD_NONE; + format->colorspace = V4L2_COLORSPACE_SRGB; + + return sensor_power(subdev, 1); +} + +/** +* @short Open device +* @param[in] subdev v4l2 subdev +* @param[in] fh v4l2 file handler +* @return Error code +*/ +static int ov5647_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh) +{ + return sensor_power(subdev, 0); +} + +/** + * @short Subdev internal operations registration + * + */ +static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = { + .registered = ov5647_registered, + .open = ov5647_open, + .close = ov5647_close, +}; + +/** +* @short Initialization routine - Entry point of the driver +* @param[in] client pointer to the i2c client structure +* @param[in] id pointer to the i2c device id structure +* @return 0 on success and a negative number on failure +* Refer to Linux errors. +*/ +static int ov5647_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ov5647 *sensor; + int ret = 0; + struct v4l2_subdev *sd; + + pr_info("Installing OmniVision OV5647 camera driver\n"); + + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); + if (sensor == NULL) + return -ENOMEM; + + mutex_init(&sensor->lock); + sensor->dev = dev; + + sd = &sensor->subdev; + v4l2_i2c_subdev_init(sd, client, &subdev_ops); + sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + sensor->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad); + if (ret < 0) + return ret; + + + ret = v4l2_async_register_subdev(sd); + if (ret < 0) + media_entity_cleanup(&sd->entity); + + return ret; +} + +/** +* @short Exit routine - Exit point of the driver +* @param[in] client pointer to the i2c clietn structure +* @return 0 on success and a negative number on failure +* Refer to Linux errors. +*/ +static int ov5647_remove(struct i2c_client *client) +{ + struct v4l2_subdev *subdev = i2c_get_clientdata(client); + struct ov5647 *ov5647 = to_state(subdev); + + v4l2_async_unregister_subdev(&ov5647->subdev); + media_entity_cleanup(&ov5647->subdev.entity); + v4l2_device_unregister_subdev(subdev); + + return 0; +} + +/** +* @short of_device_id structure +*/ +static const struct i2c_device_id ov5647_id[] = { + { "ov5647", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ov5647_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id ov5647_of_match[] = { + { .compatible = "ov5647", 0 }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ov5647_of_match); +#endif + +/** +* @short i2c driver structure +*/ +static struct i2c_driver ov5647_driver = { + .driver = { + .of_match_table = of_match_ptr(ov5647_of_match), + .owner = THIS_MODULE, + .name = "ov5647", + }, + .probe = ov5647_probe, + .remove = ov5647_remove, + .id_table = ov5647_id, +}; + +module_i2c_driver(ov5647_driver); + +MODULE_AUTHOR("Ramiro Oliveira "); +MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors"); +MODULE_LICENSE("GPL"); -- 2.8.1